Buick LeSabre 1965 Service Manual page 186

4 - 5 0 46000 4-SPEED TRANSMISSION
CLUTCH, S-M TRANSMISSION
SECTION 4-E
4-SPEED SYNCHROMESH TRANSMISSION—46000
CONTENTS OF SECTION 4-E
Paragraph Page Paragragh
4-24 Transmission Specifications 4-50 4-30
4-25 Transmission Description 4-50 4-31
4-26 Side Cover Removal 4-32
and Installation 4-53
4-27 Removal and Installation 4-33
of Transmission 4-53 4-34
4-28 Disassembly of Transmission . . . . 4-55 4-35
4-29 Cleaning and Inspection 4-56 4-36
4 - 2 4 4-SPEED TRANSMISSION SPECIFICATIONS
a. Tightening Specifications
Page
Reverse Idler Shaft Replacement. . . 4-56
Reverse Shift and Seal 4-56
Clutch Keys and Spring
Replacement 4-58
Assembly 4-58
Counter Gear Assembly 4-59
Transmission Assembly 4-60
4-Speed Trouble Diagnosis 4-62
Part
Bolt
Bolt
Nut
Bolt
Bolt
Front Bearing Retainer to Transmission Case
Side Cover Bolts
Shift Lever to Shaft
Transmission to Flywheel Housing
Flywheel Housing to Engine
Thread
Size
5/16-18
5/16-18
5/16-18
1/2 -13
3/8 -16
Torque
Ft. Lbs.
15-20
15-20
12-18
4 5 - 6 0
30-35
b. 4-Speed Synchromesh Transmission Specifications
Mounting Unit with Engine
Oil Capacity, Pints 2 1/2
Type of Gearing All Helical
Transmission Ratios - 46000
Fourth 1.00 to 1
Third 1.31 to 1
Second 1.64 to 1
First 2.20 to 1
Reverse 2.26 to 1
4 - 2 5 4-SPEED
TRANSMISSION
DESCRIPTION
The 4-speed synchromesh trans-
mission is solidly bolted to the
rear face of the flywheel upper
housing to form a unit assembly
with the engine. The transmission
main drive gear shaft extends
through the clutch driven plate
into a bronze bushing seated in
the rear end of the engine crank-
shaft. The front bearing retainer
projects into a bore in the fly-
wheel housing, serving as a pilot
to center the transmission with
the engine crankshaft.
a. Transmission Gears
and Shafts
The transmission main drive gear
is supported by a ball bearing
which is a slip fit in the front wall
of the transmission case. The
inner race of the bearing is held
tight against a shoulder on the
drive gear. The outer race of the
bearing is grooved for a snap
ring which fits between the trans-
mission case and the front bear-
ing retainer to hold the bearing
and main drive gear in place. See
Figure 4-112.
The front end of the transmission
main shaft is piloted in the bored
rear end of the main drive gear
by 14 needle rollers. The rear
end of the main shaft is supported
by a heavy-duty bearing identical
to the one which supports the
main drive gear. The inner race
of the rear bearing is grooved
for a snap ring which fits in the
rear bearing retainer. The outer
race of the bearing is retained by
a snap ring in a groove in the
shaft.
The transmission countergear is
carried on a double row of needle
rollers on each end of the coun-
tershaft. A tubular spacer sep-
arates the four sets of needle
r o l l e r s and two washer-type
spacers separates each set of
needle rollers. Two spacers are
located at the outer ends of each
set to hold the rollers in position.